Home / 20,531.76-28,335.08-11,579.64

Finding the Fourth Proportional to 20,531.76, 28,335.08 and 11,579.64

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Solution

The fourth proportional to 20,531.76, 28,335.08 and 11,579.64 is: 15,980.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.76 : 28,335.08 = 11,579.64 : x
  2. Step 2: Convert to fraction form
    20,531.76/28,335.08 = 11,579.64/x
  3. Step 3: Cross multiply
    20,531.76x = 28,335.08 × 11,579.64
  4. Step 4: Simplify right side
    20,531.76x = 328,110,025.77
  5. Step 5: Solve for x
    x = 328,110,025.77/20,531.76
  6. Step 6: Final answer
    x = 15,980.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.